Switch and computer control for fluid dispensing pumps



. Feb. 25, 1941. w. H. D. BRoUsE SWITH AND COMPUTER CONTROL FOR FLUIDDISPENSING PUMPS 3 Shouts-Sheet `1 Filed Aug. 19. 1958 Feb- 25, 1941- w. H. D. BRousE 'SWITCH 'AND COMPUTER CONTROL FOR FLUID DISFENSING PUMPS Filed Aug. 19. 193e 3 Shoots-Sheet 2 SWITCH AND COMPUTER CONTROL FOR FLUID DISPENSING FUMPS Filed Aug. `19, 193e s sheets-shear, s'

4 I r11/enfant. 'l '7. Wil/121m Brause..

Patented Feb. 25, 1941 UNITED STATES PATENT OFFICE SWITCH AND COMPUTER CONTROL FOR. FLUID DISPEN SING PUlVIPS William H. D. Brouse, Toronto, Ontario, Canada, assignor, by mesne assignments, to John Wood kManufacturing Company Inc., Conshohocken,

Application August 19, 193s, serial No. 2255782 7 claims. (c1. 221-95) forced through a suitable metering device to ay delivery hose, said metering device operating a computing mechanism for indicating the amount of liquid dispensed and the computed value thereof and the principal object of the invention is to ,10 safeguard the purchaser of liquid dispensed against either wilful or accidental computing of charges in excess of the value of liquid actually delivered, and further to avoid the injury of the mechanism through the application of force to .'15 the starting mechanism when locked.

The principal features of the inventionr consist in the novel construction and arrangement of a mechanism introduced between the motor switch control device and the computing mechanism whereby the motor switch-operating mechanism is locked at the completion of one dispensing operation and the motor cannot be restarted until the computer indicator mechanism is returned to zero, and whereby the computer resetting mechanism is locked during the operation of the motor.

A further important feature consists in the arrangement of a spring-controlled sliding connection between the starting and locking devices.

In the accompanying drawings Figure 1 is an elevational view of a motorstarting mechanism illustrating the application of this invention thereto.

Figure 2 is an elevational view of the mechanism illustrated in Figure 1, taken at right angles to the view illustrated in Figure 1.

Figure 3 is an enlarged elevational view of the control mechanism arranged between the switchoperating mechanism and the computer mechanism, the parts being shown in position ready for the starting of a portion of the motor.

Figure 4 is a view similar to Figure 3 showing the position of the parts after the motor has been started and showing the means for locking the computing mechanism in the locked position.

Figure 5 is a view similar to Figure 3 showing the position of the parts locking the switch-operating mechanism after the motor has been stopped.

Figure 6 is a view similar to Figure 3 showing the position of the parts during the resetting of the computer.

Figure 7 is an elevational View of the mechanism illustrated in Figure 3 taken from the opposite side.

Figure 8 isa vertical sectional. view taken on the line 8-8of Figure 3.

Figure 9 is a sectional detail of ,the connection between the switchcontrol device and the switch.

In fluid dispensing pumps various types of com- 5 lputing, devices are used and the resetting mech- 'anism is' operated byv a mechanismv connected withr a-.shaftiwhich in the present mechanism is indicated by the numeral I, the outward end of whichA extends into a hub member 2 and iskeyed .10 thereto by a pin 3 engaging the diametricallyopposed slots 3' in saidihub.

The hub- 2 is rotatably mounted on a stud 4 secured in a supporting plate 5 within the casing of the" pump andv on the plate the hose hook 6, 115 for supporting the dispensing nozzle, is rigidly mounted.`

A pair ofplungers 'I and 8 are suitably mounted in the plateV 5 to engage the opposite ends of a rocker arm 9 pivotally mounted on an inward ex- 20 tensiony I0 of .the hose hook and' said rocker arm is formed with a' centrally arranged lever Il to which is pivotally secured a rod I2 which extends upwardly therefrom andis arranged at one side of the hub 2. .25

A rocker plate member I3 rotatably mounted on therstud 4 carrying the hub 2, is formed with a lugextension Ill upon which a stud I5 is pivotally mounted to extend at right angles therefrom.

i The rod I 2 extends through a hole inthe stud -30 I5 and'. a spiral compression spring I2 encircles the upper end of the said rod between the-stud vI5 yand a washer I6 secured to the upper end of 4the rod so that'ifthe member I3 is locked against swing said member on its pivot. A collar and cotter I5 returns the member I 3 on pressing Y plunger l. *40

Acrod I'l. `extends through a hole in the stud I 5 and is locked thereto by nuts I1 arranged on either side of the stud. This rod is connectedto and operates the motor switch, represented at S Figure 2. :45

, Adisc I8 rigidly secured on the hub 2 is spaced from the platev 5 andi is provided with alsquared notch I9 in its periphery.

' A latch arm 2i)v ispivotallymounted on a stud 2| secured in the plate 5 and said armI extends ,50 over the periphery of .the disc I8 and has a' downwardly extending toothv 22 which is adapted .to enter the notch IQ-in'the said disc to lock it and the hub 2 from-rotation. Y

short link 23 to the rocker plate I3 so that when the plate is turned counterclockwise, through the operation of the rod I2, the arm 28 will be swung downwardly to the position illustrated in Figure 4.

A cam member 24 is xed to the plate 5 and has a peripheral portion 25 arranged concentric with the disc I8 and of slightly lesser radius than the disc. This cam is formed with a V notch 2B in its periphery below the stud 4 and slightly to one side of a vertical line extending from the axis of the stud.

A cam disc 21 is rotatably mounted on the hub 2 between the disc I8 and the iixed cam 24 and is provided with a concentric peripheral portion of substantially the same or slightly greater radius than that of the fixed cam 24, said concentric portion having a lug 21 at one end.

A concentric slot 28 is formed in the cam disc 21 and a pin 29 secured in the disc I8 extends thereinto so that when the disc I8 is rotated, it will rotate the disc 21 with it, but the disc 21 may move a limited distance freely while the disc I8 is stationary.

The cam disc 21 is formed with a V notch 39 (see Figure 5) on the side facing the iixed cam 24, and a nat spring 3| is secured to the plate 5 and is provided with a flanged tip to engage said notch to hold the cam from reversing, but will not prevent said cam disc 21 from turning with the disc I8 when the pin 29 engages the end of the slot 28. Y

`plate I3.

In the operation of this device, when the computing mechanism has been reset after a dispensing operation, the hub 2 and the disc I8 are in the position illustrated in Figure 3, the notch I9 in the disc being arranged immediately below the tooth 22 of the arm 20.

The cam disc 21 has its larger radius lug portion 21 engaging the tooth 33 of the pawl, so it is held from entering the notch 26 in the fixed cam 24. The starting plunger 8 may then be pressed inwardly to tilt the rocker arm 9 and pull downwardly on the rod I2 which, through the spring I2', swings the plate I3 on its pivot and operates the motor switch through the rod I1. Simultaneously .the .arm 20 is swung downwardly through the link 23, and the tooth 22 enters the notch I9 in the disc I8 (see Figure 4). In this movement of the rocker member, the pawl engaging the lug 21' on the cam 21 turns the cam 21 to clear the larger radius portion from register with the notch 28 and the spring 3| engages and over-rides the notch 30 in the face of the disc 21. The disc and the computing mechanism are thus locked against resetting while the motor is running.

The motor is stopped by pressing in the plunger 1 which swings the rocker arm 9 Iand lifts the rod I2, thereby returning the 4member I3 clockwise to the position shown in Figure 5. 'Ilhe tooth 22 of the arm 20 will thereby be removed from notch I9 to clear the disc I8, and the pawl 32 displaced in a peripheral path to clear the larger radius portion of the cam disc 21 which is temporarily held by the spring arm 3I. The tooth of the pawl enters the V notch 26 in the fixed cam 24 immediately prior to .the clearing of the tooth 22 from the notch I9 so that the motor switch is locked before the computer is released for resetting. The p'awl thus locks the member I3 from being operated by the operation of the plunger 8.

In ,the resetting of the computer mechanism, the shaft I thereof rotates the hub 2 and the disc I8 mounted thereon and, the pin 29, engaging one end of the slot 28, rotates the cam disc 21 until the raised portion thereof pushes the pawl 32 out of the notch 26, thereby unlocking the member I3 so that it may be operated, thus allowing the star-ting of the motor.

If ,the computer mechanism requires more than one complete revolution and a partial return movement for resetting, the locking pawl 32 is released from the notch 26 prior to the return movement of the disc I8, so that the member I3 is locked until .the notch I9 is brought back into is released.

The mechanism is extremely simple and inexpensive, butitforms a very ypositive lock against manipulatingthe computing mechanism while Vthe motor is moving, or starting the motor without resetting the computing mechanism.

An important feature of the structure resides in the provision voi? the sliding connection between the switch-operating device and the locking mechanism so that when the mechanism is locked the f, starting plunger may be operated without strain to the mechanism connected therewith. This provision enables ,the use of a light and inexpensive construction which may be manufactured at comparatively low cost.

What I claim as my invention is:

1. In a device of the class described having means to be controlled and resetting means for a ein register or the like, a rocker member operatively connected with said means to be controlled, an operating rod having sliding engagement with said rocker member, a coil compression spring said rod and salid rocker member to operate said rocker member when it is unlocked and to permit said rod to slide when said rocker member is locked, a latch mounted on said rocker member,

.encircling saidrod arranged between a stop on M5 means for engaging said latch to lock said rocker '50 member, and means adapted .to be connected with said resetting means for releasiing said latch on the resetting of the register.

2. In a device of the class described having means to be controlled and resetting means for a 5- register or the like, a. rocker member operatively connected with said means .to be controlled,

`means for operating said rocker member, a latch mounted on salid rocker member, lxed means adapted to engage said latch to lock said rockerA 'register or the like, a rocker member operatively connected with said means to be controlled, means operatively connected with said rocker 4member to operate the same, a latch mounted on said rocker member, xed means adapted to engage said latch to lock said rocker member, a rotary member for operative connection with said Aresetting means, a pin extending from said rotary member, and a cam disc rotatably mounted co-ax-ially with said rotary member having a concentric slot slidably receiving said pin and having a cam projection adapted on rotation to engage and release salid latch on the rotation of said rotary member by the resetting means.

4. A device as claimed in claim 3 having a lug on said `cam disc yto engage said latch to rota/te said cam disc on the operation of said rocking member in one direction and move said cam projection clear of the xed means for engaging and lo'cking said latch and rocker member.

5. A device as claimed in claim 3 in which said cam disc is provided With a notch, and a xed spring arm engages said disc and enters the notch therein to hold said cam disc from return movement after being moved by said latch to clear the latch locking means.

6. In a device of the class described having a motor sWti-tch `control device and resetting means for a register or .the like, a rocker member operatively connected With said motor switch control device, means for operating said rock-er member, a notched rotary member for operative connection with said resetting means, an arm mounted on a fixed .pivot having a tooth extension to enter the notch in said rotary member, a link connectlng the free end of said pivotal arm with said mounted in axial alignment With said shaft, a hub rotatably mounted on said stud and engaged to rotate with said shaft, said hub having a disc provided with a peripheral notch, a pin extending from said disc, a cam disc rotatable on said stud and having a concentric slot receiving said pin and a concentric cam extension, a xed melmber having a concentric periphery of substantially the same radius as the radius of said cam extension the periphery thereof having a notch therein, a rocker member plivoted on said stud, a latch pivoted on said rocker member and having a tooth portion riding on the peripheries of said iixed notched member and said cam disc and adapted to enter said notch, a rod connecting said rocker member with said means to be controlled, and means connected with said rocker mem-ber for engaging the notch in .the disc carried by said hub, and means for actuating said rocker member.

WILLIAM H. D. BROUSE. 

